Coolant in Combustion Chamber (LDK, LHU)
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Coolant in Combustion Chamber (LDK, LHU)
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Cause
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Correction
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DEFINITION: Excessive white smoke and/or coolant type odor coming from the exhaust pipe may indicate coolant in the combustion chamber. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an overtemperature condition which may cause engine component damage.
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2.
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Remove the spark plugs and inspect for spark plugs saturated by coolant or coolant in the cylinder bore.
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3.
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Inspect by performing a cylinder leak down test. During this test, excessive air bubbles within the coolant may indicate a faulty gasket or damaged component.
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4.
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Inspect by performing a cylinder compression test. Two cylinders side-by-side on the engine block, with low compression, may indicate a failed cylinder head gasket. Refer to
Engine Compression Test
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Faulty cylinder head gasket
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Replace the head gasket and components, as required. Refer to
Cylinder Head Cleaning and Inspection (LDK, LHU)
and
Cylinder Head Replacement
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Warped cylinder head
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Replace the cylinder head and gasket. Refer to
Cylinder Head Cleaning and Inspection (LDK, LHU)
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Cracked cylinder head
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Replace the cylinder head and gasket.
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Cracked cylinder liner
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Replace the components, as required.
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Cylinder head or block porosity
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Replace the components, as required.
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